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Verify That Each Equation Is an Identity sin⁡(4x)=(4sin⁡xcos⁡x)(2cos⁡2x−1)\sin ( 4 x ) = ( 4 \sin x \cos x ) \left( 2 \cos ^ { 2 } x - 1 \right)

Question 14

Essay

Verify that each equation is an identity.
- sin⁡(4x)=(4sin⁡xcos⁡x)(2cos⁡2x−1)\sin ( 4 x ) = ( 4 \sin x \cos x ) \left( 2 \cos ^ { 2 } x - 1 \right)

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